Cain finally gets to participate in a magic class, this time to learn summon magic... and he ends up summoning the Prince of Darkness. Meanwhile, signs of a monster onslaught have been observed in the Forest of Monsters.
If you can't form a contract, 
it'll just leave,
،إذا لم تستطع تأسيس عقد، سيُغادر فحسب
Se non puoi stipulare un contratto, se ne andrà,
Se não conseguir firmar
contrato, ele só vai sumir,
Не сможешь подчинить — он пропадёт,